Fix Phase 4 cycle 4 review issues
- Identity tests now use cursorless healthy_labels_response to avoid HTTP stage
triggering an unconfigured-second-page request, removing [NET] noise rows from
all 12 identity snapshots.
- Replace fully-qualified paths in pipeline.rs with imported module aliases.
- Document HttpFacts as consumed by Phase 6 Crypto stage.
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>